We offer Ss Top & Bottom Adaptor.CPVC Components manufactures bottom and top adaptors for fitment with Drop Riser Pipes. Our threads are in 11 TPI. Bottom thread of the bottom adaptor & Top thread of the Top adaptor are 11 TPI. However for customization of these threads please specify with drawings. TOP ADAPTORS:Top adaptors are available in MS Seamless Cast iron Stainless Steel and are used to connect the Riser Drop top pipe with bend fitting. BOTTOM ADAPTORS:Bottom adaptors are available in Cast iron Stainless Steel and are used to connect the bottom pipe with the pump.